#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,s;
	cin>>a;
	if(a<=100){
		s=a*2;
	}
	if(a>100){
	    s=a;	
	}cout<<s;
}

/**************************************************************
	Problem: 1637
	User: tonghuawei
	Language: C++
	Result: Wrong Answer
****************************************************************/